Heat sink or similar article



FIG. 1 is a perspective view of a heat sink or similar article showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a side elevational view thereof, the opposite side being a mirror image of that shown in FIG. 4; and

FIG. 5 is an end elevational view of the end thereof opposite that shown in FIG. 1. 

The ornamental design for heat sink or similar article, as shown. 